Hayward Universal H-Series Natural Gas Heater 150K BTU | W3H150FDNProduct Overview The Hayward Universal H Series Natural Gas Heater W3H150FDN is a 150,000 BTU pool and spa heater designed to deliver reliable, efficient heating for residential in ground pool and spa applications. Built on Haywards Universal H Series platform, this heater combines dependable natural gas performance with installation flexibility, corrosion resistant construction, and easy to use digital controls. Featuring a cupro nickel heat

improper plumbing

which can help reduce energy use compared with traditional single-speed pumps

5" Union Kit for 3HP IntelliFlo3 Pool Pump

VDE and GS certified

and sun shelves with customizable colors and dynamic lighting effects

filter area helps extend the time between cartridge cleanings

Avoid touching the polished ceramic or carbon faces directly

No Booster Pump Needed – Connects directly to your existing pool filtration system

The Milwaukee 8 in

Installs quickly and easily with no calibration required

The O-ring and sealing surfaces should be inspected and replaced if worn

and general circulation while helping reduce operating costs